My early99 mentions catalyst on the valve cover sticker two or three times(my truck is 25miles away in the shop with a dead jug so I can't verify 2 or 3 times). My truck is a Canada truck that was imported into the US, it is not a Cali truck. It had a cat that got scared of my Aussie and ran away in a very short time after bring the truck home......LOL... She, the kitty, is hiding on the shelf in the garage just in case.